Trigger guard



FIG. 1 is a side-bottom isometric view of a trigger guard showing my new design included on a firearm;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an enlarged detailed view of FIG. 1 including the claimed region; and,

FIG. 4 is an enlarged detailed view of FIG. 2 including the claimed region.

The broken line showing of the remainder of the firearm is for environmental purposes only and forms no part of the claimed design. 

The ornamental design for a trigger guard, as shown and described. 